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http://www.av199.com/viewthread.php?tid=291223&extra=pageD1&page=1
We are still waiting for a statement from Casio regarding the brightness issues we've seen on the new LED/Laser Hybrid light engines. But in the meantime, we have some more test results to share...
虽然已经看过卡西欧的激光LED混合光源的亮度表现,但我们还在等待卡西欧官方提供的说明文件。不过现在我们已经有一些测试结果可以与大家分享了。
Since we have had a total of five units in house, we've been able to do some extended usage testing to see if the Hybrid light engine maintains its brightness and color characteristics over time. Our findings thus far are that maximum lumen output drops over the first 100 hours of use. On one of our XJ-A130s, the max lumen output was 1228 when it was new. After 130 hours of use its maximum brightness dropped to 949 lumens, which is a 23% reduction.
我们现在手头有五台机器,所以我们可以做一些扩展性的使用测试来看看混合光源投影机在长时间使用下是否依然保证其亮度和色彩的特点。 到目前为止我们发现新机使用超过100小时后最大流明输出会下降。我们手头的其中一台XJ-A130, 开箱时最大流明输出1228流明,但使用过130小时之后其最大流明输出降为949流明,降幅达23%。
The Casio User's manual indicates that the high altitude mode of operation (which increases fan speed and audible noise) is recommended at elevations above 3300 feet. We do our testing at 3100 feet. Since this is close to the limit, we decided run a second test with the high altitude fan engaged. The second unit started with a maximum reading of 1630 lumens, and after 100 hours of run time its maximum lumen output had dropped to 1470, or a 10% drop.
卡西欧的用户手册里提到在海拔3300英尺(1006米)以上使用时建议开启高海拔模式(此模式下风扇速度和噪音明显增加)我们的测试环境为海拔3100英尺(945米) 因为海拔高度差不多,我们决定在高海拔模式下进行第二次测试。 这次测试结果是第二台机器开机最大流明输出1630流明,运行100小时后最大流明输出降为1470流明,降幅为10%。
Two notes of caution are in order. First, in order to get 100+ hours of use on these test units, they were run with a 100 IRE white test pattern continuously, 24 hours per day. This is not the way people normally use products of this type. We do not know whether brightness degradation is exaggerated by continuous use. More testing of a wider array of samples under different usage conditions would be required to support any definitive conclusions.
提出两点值得注意的地方,第一点,为了在这些测试样机上获得100小时以上的测试结果,我们采取了24小时连续不间断的100 IRE全白画面测试,通常人们是不会这么来使用投影机的。 但我们不确定所测得的亮度衰减是否是由于连续使用过长时间所造成的。 这需要更多的样机在其他不同使用条件下来进行更多的测试才能得出最终的结论。
Second, we do not know the degree to which our 3100 foot elevation is affecting results. It may be that brightness degradation would proceed at a slower pace at sea level. Though the test unit with the high altitude fan engaged has diminished less over the first 100 hours of use, this was a much brighter unit to begin with. Furthermore, it draws 178 watts in full power operation, whereas the dimmer test sample draws only 138 watts. There are too many variables, and not enough test data, to draw any certain conclusions.
第二点,我们还不确定3100英尺(945米)测试环境的海拔高度对测试结果的影响程度到底有多少。 有可能在海拔较低的地方亮度衰减程度会较低。 虽然那台测试样机开启高海拔模式后使用100小时亮度削弱的更多,但那台也是所有样机中初始亮度更高的一台。 另外那台高海拔模式测试样机全功率模式工作下测得功率为178瓦,而初始亮度较低的样机仅测得138瓦。 所有不确定性因素很多,并且得不到足够的测试数据来做出任何确定的结论。
We have noticed another interesting phenomenon as a result of the extended usage test. Color balance on the first of the two units (the one which now measures 949 lumens) actually improved after 130 hours of use. Initially the picture had excessive blue and green components with very little red. Now it looks more neutral, with red coming more into balance with green and blue. It appears that the red component, which comes from the LED, remains relatively stable in its light output, while the blue and green that are produced by the laser diminish over time, causing the unit to trend toward a more neutral color balance.
我们在此次扩展性使用测试中还发现了一个有意思的现象。 上述测试的第一台机器(就是亮度降为949流明的机器)使用超过130小时之后,其色彩平衡反而有所改善。起初这台机器的画质显得蓝色和绿色过分而红色不足, 但现在看上去更自然一些,红色在增加从而使得三原色更平衡。 其缘故应该由于红色是由LED光源提供的,亮度输出相对稳定,而蓝色和绿色是由激光光源提供的,而这部分会随着使用时间而衰减,最后导致随着使用时间的递增画面反而更自然。
So far we have seen this on just the dimmer of the two test samples. The brighter of the two units still shows a significant weakness in red, and color balance on this sample is quite poor.
我们在目前为止的两台样机中初始亮度较低的那台上看到了这个现象,而初始亮度较高的那台投射出的画面依然红色表现很弱,色彩平衡较差。
We will continue to run these units to see what further developments ensue. And we will report any information forwarded to us by Casio once they have had a chance to evaluate the issues at hand.
我们将继续测试这些样机来获得更多进展,并且我们将会公布我们所获知的任何卡西欧针对目前情况所作出的评估消息。
Evan Powell
Editor
伊万 鲍威尔
编辑
个人的一点感想
激光光源的蓝绿色表现毋庸置疑,但主管蓝色和绿色的激光光源和主管红色的LED光源的衰减速度不同步性是个问题,色彩平衡性会不会随着使用时间的推移而进一步变化呢,看来索尼研发三原色激光即红绿蓝三色均由激光光源提供的家用机不无道理。
by hucs2006 [s:97] |
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